Twisted lobed dandelion
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Twisted lobed dandelion ( Taraxacum tortilobum ) |
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The Gedrehtlappige dandelion ( Taraxacum tortilobum ) is a plant from the genus dandelion ( Taraxacum ) within the family of Compositae (Asteraceae).
description
Vegetative characteristics
The twisted lobed dandelion grows as a perennial herbaceous plant .
The leaves are light green, curled and lobed. The lateral lobes are protruding to bent back, strongly toothed, curled triangular to broadly lanceolate. The plant has long, narrow, dark purple petioles.
Generative characteristics
The flowering period extends from mid to late April, and a little earlier in warmer years. The flowers stand together in flower heads. Taraxacum tortilobum has an olive-green, frosted shell. The outer bracts of the flower are eifrömig to eilanzettlich, loose-fitting or upright spreading, relatively wide white or pink edged and humped up horned (calluses). The flowers are deep yellow. The stigma are dark green.
An important distinguishing feature of calluses dandelions are the achenes , which in Taraxacum tortilobum are beige in color, similar to the species of meadow dandelion . They are 3 to 3.5 mm long, the pyramid 1 to 1.3 mm long and almost cylindrical.
The number of chromosomes is 2n = 24.
Occurrence
Distribution in Germany
The twisted lobed dandelion occurs all over Germany. It is very rare in eastern Germany and in the south of Baden-Württemberg and Bavaria (Hammel 2019).
Distribution in Europe
The species occurs in northern and central Europe. Taraxacum tortilobum is absent in the Mediterranean region (Doll 1974: 111).
Location requirements
The plant grows in Germany in wasteland, on pastures and in semi-arid grasslands. Occurrences in and on the edge of shear lawns are relatively common.
Systematics
The first description of Taraxacum tortilobum was made in 1914 by the Swede Bruno Florström.
The species belongs to the section of the calluses dandelions ( Taraxacum sect. Erythrosperma ) in the genus Taraxacum .
literature
- Reinhard Doll: The genus Taraxacum , Die Neue Brehm Bücherei, No. 473, 1974, 158 pp.
- Bruno Florström: Study . Öfver Taraxacum-floran I satakunta. , In: Acta Societatis pro Fauna et Flora Fennica. No. 39 (4), pp. 1-125, 1914.
- Ingo Uhlemann, Jan Kirschner, Jan Stepanek: Taraxacum. , In: Rothmaler: Exkursionsflora von Deutschland - Vascular Plants, Critical Supplementary Volume. 11th edition, Berlin, Heidelberg (Springer Spectrum), 2016, pp. 133-184.
- Network Phytodiversity Germany & Federal Agency for Nature Conservation (Hrsg.): Distribution atlas of fern and flowering plants in Germany. , 912 S., Münster (Landwirtschaftsverlag), 2014.
- Steffen Hammel: Calluses dandelions (Taraxacum section Erythrosperma) in Baden-Württemberg - Finds 2017 and 2018. In: Jh. Ges. Naturkunde Württemberg , No. 175, Stuttgart, 2019.
Individual evidence
- ↑ Thomas Gregor, Ralf Hand, Juraj Paule: Chromosome numbers of fern and flowering plants from Germany 10. In: Kochia , Volume 10, 2017, pages 45-53. ( online )
Web links
- Twisted lobed dandelions on bayernflora.de